At 09:26 AM 8/16/02 -0500, you wrote: >Since sourced and sunk currents are the same, where does a beginner that >is only reading the data sheets learn that grounding is better? Or is >it reflected in a different characteristic? Look at the typical and maximum voltage drops for sinking and sourcing a given current level. The internal N-channel MOSFET is "better". If you've studied solid-state physics, you'll know why too, but it's not particularly important. Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com 9/11 United we Stand -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics